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Патент USA US2120924

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~ 2,120,924
Patent-ed June 1v4,_1-938
Sigismund Stillschweig, Berlin, Germany
' Application September 19,1935, Serial No. 41,299
In Germany October 11, 1934
4 Claims.
(Cl. 24-4805) _
The present invention relates to separable fas
teners and more particularly to that type of fas
teners for garments, underwear and other'pur
poses wherein two pliable stringers carrying fas
According to. the invention the above named’tad- Y
vantages are achieved by giving the fastener
members such a bentform, that the locking parts
of the same do not project beyond the preferably
beaded stringer edge to which the fastener mem
are attached, but are located at the. side of
-ment'of a sliding member.
' -_
In known fasteners of the described type the the bead or seam of the stringeredge and partic
- locking elements proper of the fastener members’ ularly laterally behind this bead or seam in such
5 tener members are locked and unlocked by move
project beyond the edges of the stringers to which
a manner, that the beads or seams of the stringers
'10 they are attached, so that between the ‘edges an ' in closed position are bent off from the plane of 10
intermediate space is formed, which is only in the latter, so that the series‘of fastener members ‘
part covered by the interlocking parts of the fas
tener members and the width of which can not
be reduced below a de?nite ‘limit, even if the fas
_15 tener members used ‘are of the smallest possible
dimensions. This involves various drawbacks
when the fasteners are used in garments, bags
and the like, and particularly when they are used
in connection with pieces of underwear carried
2OJdirectl'y on the ‘body, since in this case the parts
of the fastener members covering the space be
tween the edges of the stringers will contact with
the skin. When fasteners of the known kind are
used for other purposes, for instance'in connec
tion with ladies’ hand bags, the stringers of fabric
or other materials. are also frequently felt as an
annoyance, and this has without, doubt limited
the use'of separable fasteners of the described
kind for various purposes.
According to the present invention the fastener
members ares‘o formed, that, in contrast to ‘the
devices heretofore used, the space between the
locked stringers is completely or practically com
pletely closed, so that when the fasteners are used
65 O!~ on underwear or the'like, the metallic parts of
‘the fastener members will not come‘ into contact
with the body, and‘there‘will‘be no spaces through
which air, mud -or other materials might pass.
Such a fastener can be used for instance in
Q 40 underwear without causing any discomfort, be
cause the inner facés of the projecting parts of
the fastener members in locked state are valways
covered by the contacting edges of the stringers.
It can also with advantage be used in hand bags
.45 and similar portable containers, because the me—
‘ tallic fastener members projecting beyond and
lyingabove 'the plane of the stringers form a
strap-like body, which is a good substitute for
the metal handles otherwise used in connection
50 with handbags and the like. The novel fastener
is also very ‘pliable and forms a reliable ‘closure,
which can not be opened neither by pulling in
the plane of the stringers nor by bending it in
is lying in a plane parallel to that of the stringer,
At the same time the ‘interlocking, parts of the '
fastener members may be so dimensioned rela
tive to the clamping'parts of the same,'by means 15 I I
of which the members are ?xed to the stringers,
that in locked position the opposing faces of the
clamping parts are lying tightly adjacent‘ each
other and are only separated from each other by a‘
the double thickness ‘of the stringer.
In closed 20
position the bent-off opposing edges of ’ the
stringers carrying ‘the series of fastener members
will therefore contact with each other and cover
the inner surfaces of the interlocking parts of the ,
fastener members, whereas, at the same time, 25‘
the fastener members on the outer side form a
strap-like metallic body.
The form of the interlocking parts proper of
the fastener members is per se of no importance.
The same may for instance consist of projections 30
and grooves or of hooks on one side of the clo-' .
sure which are adapted to cooperate ‘with eyelets
on the other side. When the locking parts con- .
sist of projections on the members on one of the
stringers and corresponding grooves in the lock- 35
ing parts of- the members on the other stringer
it is however of ‘importance that the fastener
members arranged 'in series on one of the
stringers, for instance the left one, form mirror
images of theJfastener members carried by the 40
other'stringer, in order that each projection can
be brought .into position opposite the appertain
ing groove when the’ fastener is closed by means
of the slider.
When the fastener members are formed DA the 45
manner- described an increased security is“ ob
tained, since it is possible to give the interlocking
surfaces a much greater length than the known
fasteners in which the individual members have
locking partslying in front of the beaded edges 50
of the stringers;
for the novel fastener arrangement. This ‘does
- a direction perpendicular to the plane of the‘ not like the known fastener sliders consist of a
65 stringers.
' The form of the slider is also of importance
front wall and a back wall surrounding the‘ 66
fastener members on both sides, but does only
comprise a front wall, since the rear side of the
series of fastener members is covered by the
edges of the stringers. The side walls of the
‘ slider are at their free ends inwardly bent so as
to form narrow ?anges running substantially
parallel to the front wall.
These ?anges are
adapted to catch behind the parts of the fastener
members projecting from the plane of the
10 stringers. The pulling tape or ring of the fas
tener can be arranged on the front or the-rear
side of the slider, depending upon the mannerv
in which the fastener is to be carried’ and the
purpose ‘for which it is designed.
Some preferred constructional forms of the
invention are illustrated by way of examples in
the accompanying drawing.
Fig. 1 is a face view showing a partially closed
fastener with'the Opposing stringer edges con
20 tacting with each other.
Fig. 2 shows a slider seen from the rear side.
Fig. 2E‘ is a section taken along the line 2*1----2a
in Fig. 2.
Fig. 2b is a section‘taken on the line 2'1'--2b in
Fig. 2.
Fig. 3 is a plan view, partially in section, of a
preferred form of fastener members. Fig. 3 also
shows‘, how these fastener. members may be
clamped to the beaded edge of a stringen.
In order to obtain a tight
closure the clamping jaws 6, must be so dimen
sioned relative to the locking shanks 7, that the
fronts of the former, when the fastener is locked,
are separated from each other by a double layer,
of stringer material.
Instead of the fastener ‘members described
above, which are equipped with cooperating pro
jections 8 and grooves 9, fastener members with
locking elements of a different form may be used.
Figs. 7 and 8 show for instance fastener mem
bers the parts ‘I of which on one side, are formed
with hooks i0 and on the opposite side with
eyelet-shaped grooves II, which latter are later
ally displaced relative to the hooks. The form
of .the cooperating locking elements is altogether ‘
of little or no importance. The only matter of
importance is the position of the parts 1 relative
' to the clamping jaws 6 and therewith the par
ticular position of the fastener members I relative
to the stringers 4 and 5.
The Figs. 4, 5, 6, 7 and 8 show the right and
left hand fastener members with cooperating pro- .
jections and grooves.
Figs. 2, 2a'and 2b show in detail a slider suitable
for use in connection with the novel fastener
e slider has affront wall I2. ' A rear
wall is not provided, because the fastener mem-
Fig. 4 is a plan view partially in section show
bers, as already mentioned, on the rear side are
ing the position of the fastener members and the _ not exposed, but are covered by the material of ‘
stringers when the fastener is in unlocked posi
the stringers. The lateral edges of the front wall
. Fig. 5 is a plan view partially in section show
ing the position of the fastener members in closed
Fig. 6 is a front view partially in section of th
device shown in Fig. _5.
Fig. 7 is a perspective showing two cooperat
leather or the like.
ing‘ fastener members having interlocking parts
in the form of hooks and eyelets.
Fig. 8 is a front view partially in‘ sectionshow
ing still another modi?cation ‘of the fastener
I! have the form of U-shaped guide channels l3,
I4, which embrace. the parts of the fastener
members projecting from ‘the plane of the 36
stringers. The short ?anges l3’ and H’ of the
guide channels catch behind the edges of the
fastener members and prevent the‘slider from
being detached from the rows of fastener ele
The operative part l5 of the slideris equipped .
with a plate-shaped member l6 which is formed
with a slot ‘I6’ in which ‘the handle or strap is
fixed by means of which the slider is‘moved.
The slider cam I5 is formed with laterally and
According to Figs.‘ 1 and 3 vto 6 the fastener
members I, I’, which are clamped to the beaded _ downwardly ‘projecting ribs l5’
which are adapt- '
edges 2 and 3 respectively of the stringers 4, 5,
to catch behind the parts of the fastener
consist of clamping jaws 6, 6’ which are adapted ed
to be clamped to the beaded stringer edges 2 and 3 members carrying the locking projections (see;
Fig. 5), so that the said members, when the slider
and of shanks ‘I having interlocking is
moved, are always guided in a single common
elements. ~The latter do not as in the fasteners
‘ of known construction project beyond the front plane and are not dislocated above or below one
edge of the beads 2 and 3, but are arranged
laterally to and particularly laterally behind the v. The stringers 4and 5, to the beads or edges ‘2
and 3 of‘ which the fastener elements are clamped
clamping jaws 6, 6’, so‘that the projectionsor
‘cams 8 as well as the corresponding grooves 9 , can on the parts of the same which contact 55
the fastener is closed be equipped with
will lie substantially parallel to the sides of they .when
beads 4’, 5' (see Fig. 3) or be other
stringers 4 and 5, before the edges of the latter
wise thickened,.'in order to forma still tighter
are bent (Fig. 3). In operative state the fas
60 tener members I, I' take the position relative to
the stringers 4- and 5 shown in Fig. 4, when the
1. ‘In-a separablefastener, in combination, a
fastener is open, and the positionvshown in Fig. 5,
when the fastener is closed. In operative or
?nished state the beaded edges 2 and 3 carrying
thQ fastener members are bent twice about 90°,
so- that they form an angle of 180° with the plane
of the stringers 4 and 5. The fastener mem
bers I, I’ are therefore on one side in their en
pair of stringers, a series of fastener members
?xed to one edge of eachgstgringer, each fastener
member comprising clamping legs and a shank
with looking elements, and slidable means for 65
interlocking and releasing‘ the fastener mem
\ bers, said slidable means comprising a slider hav
tirety located outside of the plane of the stringers _ ing U-shaped guide channels with ?anges to
4 and 5, and will therefore act as a metal strap ‘catch behind the clamping‘ legs and having a cam
?xed to the said stringers, whilst on the inner _ ‘with laterally projecting ribs,‘ adapted to catch
behind the shanks of the fastener members carry
side (see Fig. 5) the right-angularly bent beaded
edge of the stringer 4 will contact with the right
angularly bent edge of the stringer 5, so that the
76 inner faces of the fastener elements in lockedi
ing the locking elements and thereby prevent un
desired dislocations ‘ of said members when the
slider is moved, the shank of eachfastener'mem
her having the locking elements constituting an 75
_ extension of ‘one of the clamping legs and each uniform cross-section and being bent into the
stringer having a beaded edge and the clamping form of an I and encircling said bead from one
legs of each fastener member embracing the bead face of the tape to the opposite face thereof, the
and being rounded off and being of a thickness tape being carried around the end of saidclamp
such that the shank of the fastener member which ing member 180° so as to lie in a plane offset from 5
carries the locking elements is thereby held at the that containing the locking shank and so as to
'- desired distance from the stringer to permit the . extend in a direction opposite to’ that in which
V slide to operate.
said locking shank extends, the locking shanks
2. In a separable fastener, a pair of stringers being located in front of the beads and being of ‘
such length that when interlocked the tapes will 10
10 comprising ?at strips' having, beaded edges, a
series of fastener members ?xed tov one edge of ' lie in close proximity in virtue of which there will
each stringer, 'each‘fastener member having- a belittle or no space between the tapes of adjacent
clamping member of uniform cross-section
throughout and encircling the beaded edge of the
15 stringerjo which it is attached, each fastener
member also having a shank'with locking ele
ments and slidable means for interlocking and
releasing the fastening members, said flat strips
being carried around the ends of the clamping
4., In a separable fastener, supporting stringers
each comprising a flat tape having a bead along 15
one edge, a set of. fastener members, each fastener
member comprising a clamping member and look
ing shank, said clamping member being of a uni
form cross-section and being bent into the form
20 members through an arc of 1180"‘ to extend in a I of an I and encircling said bead from one face 20
plane parallel to the shanks having the locking
of the tape to the opposite face thereof, the tape
elements and offset therefrom, said slidable means being carried around ‘the end of said clamping
comprising a front plate, of Y-shape in plan view, member 180° so vas to liein a plane offset from
and sides whose edges are bent inwardly to form that containing the locking shank and so as to
extend in a direction opposite to that in which 25
25 U-shaped guides, and a cam member between the
divergent portions of- the Y, said guides being said locking shank extends, and a slidable mem
shaped to embrace said fastener members around. ber for interlocking and releasing the fastening
the clamping members thereof to draw together ‘members, said slidable member including a front
the beads of said stringers which’ lie in a plane plate of Y-shape in plan view and side ?anges in
30 offset from the plane containing those portions planes at right angles ,to said front plate, the 30
of said ?at strips which were carried around the edges of said ?anges being bent inwardly to pro
vide U-shaped guides to embrace said fastener. “
ends of said clamping members.
3. In a separable fastener, supporting stringers members’ clamping shanks to draw together the
each comprising a ?at tape having a bead along beaded edges of said stringers, the furcations of
35 one. edge, a set of fastener members, each fastener the Y embracing between them a cam member 35
for separatinglthe edges of said stringers.
member comprising a clamping member and look
ing shank, said clamping member being of a‘
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